No problem, we've got 6397 and 3616 to multiply
6397 × 3616 = 3616 × (6397)
+ 3616 × 7 resulting in 25312
+ 3616 × 90 what gives us 325440
+ 3616 × 300 that results in 1084800
+ 3616 × 6000 resulting in 21696000

= 23131552
